Answer
Yes. Nausea, vomiting and diarrhoea have been reported, and sorbitol may cause discomfort or a mild laxative effect.
Sources for this answer
- Benylin Herbal Chesty Coughs Sugar Free Syrup — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.